Planta Med 1995; 61(1): 22-25
DOI: 10.1055/s-2006-957991

© Georg Thieme Verlag Stuttgart · New York

Blockade by Ginseng Total Saponin of the Development of Methamphetamine Reverse Tolerance and Dopamine Receptor Supersensitivity in Mice

Hack-Seang Kim1 , Jin-Goo Kang1 , Hang-Mook Rheu2 , Dae-Hyun Cho2 , Ki-Wan Oh1
  • 1Department of Pharmacology, College of Pharmacy, Chungbuk National University, Cheongju 360-763, Korea
  • 2Department of Toxicology, The National Institute of Safety Research, Seoul 122-040, Korea
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Publication History



Publication Date:
04 January 2007 (online)


Repeated administration of methamphetamine (2 mg/kg) developed reverse tolerance to the ambulation-accelerating effect. Intraperitoneal administration of ginseng total saponin (GTS, 200 mg/kg of body weight) prior to and during chronic administration of methamphetamine inhibited the development of reverse tolerance. Dopamine receptor supersensitivity was also developed in reverse tolerant mice which had received the same methamphetamine. The development of dopamine receptor supersensitivity was evidenced by the enhanced hypothermic response to apomorphine (1 mg/kg) and the enhanced ambulatory activity of apomorphine (4 mg/kg). GTS also prevented the development of dopamine receptor supersensitivity induced by the chronic administration of methamphetamine. These results show that GTS may be useful for the prevention of and therapy for the adverse action of methamphetamine. It is concluded that the development of reverse tolerance to methamphetamine may be associated with the enhanced dopamine receptor supersensitivity since both phenomena were blocked by GTS.